Simple auxiliary tool for worm gear testing on ordinary lathe

Abstract

This invention discloses a simple auxiliary tool for testing worm gears on a conventional lathe. It includes a movable seat, a fixed seat, and a fixed shaft. The fixed seat is fixedly mounted on the tool holder of the conventional lathe. One end of the movable seat is movably mounted on the fixed seat and can be secured by a tension bolt. The other end of the movable seat is fixedly mounted on the fixed shaft, and the worm gear is sleeved on the fixed shaft via a bearing. The movable seat is engraved with a scale indicating the rotation angle, and the fixed seat has an indicator mark at the corresponding scale position. The worm gear is mounted on the lathe's main axis, ensuring free rotation. The worm gear is mounted on the simple auxiliary tool, allowing free rotation. The simple auxiliary tool allows for fine-tuning of the angle and height to ensure the correct installation position of the worm gear and worm and the visibility of the fine-tuning angle. This invention has a simple structure, good manufacturability, and convenient operation, and has certain practical value.

Description

Technical Field

[0001] This invention relates to the field of mechanical parts inspection, and in particular to a simple auxiliary tool for inspecting worm gears on a conventional lathe. Background Technology

[0002] In the manufacturing technology of ordinary cylindrical worm gears and worms, such as Figure 1 As shown, the installation distance A of the worm gear 14 and worm 13, the position and area of ​​the tooth surface contact zone, and the meshing jamming directly affect the quality after assembly. In actual machining, the worm 13 is first machined according to the design requirements, and then the worm gear 14 is machined on a gear hobbing machine using a special worm gear hobbing cutter (the worm gear hobbing cutter is the same size as the worm). During the machining process, the tilt angle of the worm gear hobbing cutter needs to be adjusted to ensure the position and area of ​​the contact zone.

[0003] Adjusting the tilt angle requires simulated installation testing. Based on the contact area, the tilt angle of the gear hobbing cutter is adjusted, a process performed using specialized equipment. Since most manufacturers lack such specialized equipment, it is difficult to achieve accurate adjustment of the gear hobbing cutter's tilt angle. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a simple auxiliary tool for worm gear testing on a conventional lathe that is simple in structure and easy to operate.

[0005] The technical solution of this invention to solve the above-mentioned technical problems is: a simple auxiliary tool for testing worm gears on a conventional lathe, comprising a movable seat, a fixed seat, and a fixed shaft. The fixed seat is fixedly installed on the tool holder of the conventional lathe. One end of the movable seat is movably installed on the fixed seat and can be fixed by a tension bolt. The other end of the movable seat is fixedly provided with the fixed shaft, and the worm gear is sleeved on the fixed shaft through a bearing. The movable seat is engraved with a scale to display the rotation angle, and the fixed seat is provided with an indicator at the corresponding scale position.

[0006] The aforementioned simple auxiliary tool for testing worm gears on a conventional lathe includes a fixed base comprising a cylindrical body, which is fixedly mounted on the tool holder of the conventional lathe. An annular plate extends outward from the outer circumference of one end of the cylindrical body, and an indicator is disposed on the outer circumference of the annular plate.

[0007] The aforementioned simple auxiliary tool for testing worm gears on a conventional lathe includes a mounting post at one end of the movable seat, which is inserted into the cylinder. The mounting post has a threaded hole at its end, and a tension bolt is inserted from the other end of the cylinder and threadedly connected to the mounting post. The middle of the movable seat is a conical surface with ±20° graduations marked on it, located near the indicator.

[0008] The aforementioned simple auxiliary tool for testing worm gears on a conventional lathe has two parallel mounting arms at the other end of the movable seat. The ends of the mounting arms have mounting holes, and the two ends of the fixed shaft are fixedly installed in the mounting holes of the two mounting arms.

[0009] The aforementioned simple auxiliary tool for testing worm gears on a conventional lathe has spacers on the fixed shaft located on both sides of the worm gear for limiting the movement of the worm gear.

[0010] The beneficial effects of this invention are as follows: the worm gear is mounted on the lathe spindle, ensuring its free rotation; the worm wheel is mounted on a simple auxiliary fixture, allowing for free rotation, and the fixture allows for fine-tuning of angle and height, ensuring the correct installation position of the worm wheel and worm gear, as well as the visibility of the fine-tuning angle. This invention has a simple structure, good manufacturability, and convenient operation, possessing certain practical value. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the fit between the worm gear and the worm.

[0012] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0013] Figure 3 for Figure 2 The left view.

[0014] Figure 4 for Figure 2 Top view. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] This invention utilizes the meshing principle of a worm gear and a worm to simulate the installation position and angle of the worm gear and worm. For example... Figures 2-4 As shown, a simple auxiliary tool for testing worm gears on a conventional lathe includes a movable seat 1, a fixed seat 2, and a fixed shaft 3. The fixed seat 2 is fixedly installed on the tool holder of the conventional lathe. One end of the movable seat 1 is movably installed on the fixed seat 2 and can be fixed by a tension bolt 4. The other end of the movable seat 1 is fixedly provided with the fixed shaft 3, and the worm gear 14 is sleeved on the fixed shaft 3 through a bearing. The movable seat 1 is engraved with a scale 5 to indicate the rotation angle, and the fixed seat 2 is provided with an indicator 6 at the position corresponding to the scale 5.

[0017] The fixed base 2 includes a cylindrical body 7, which is fixedly installed on the tool holder of a conventional lathe. An annular plate 8 extends outward from the outer circle of one end of the cylindrical body 7, and the indicator 6 is disposed on the outer circle of the annular plate 8.

[0018] The movable seat 1 has a mounting post 9 at one end, which is inserted into the cylinder 7. The end of the mounting post 9 has a threaded hole, and the tension bolt 4 is inserted from the other end of the cylinder 7 and threadedly connected to the mounting post 9. The middle part of the movable seat 1 is a conical surface 10, on which a ±20° scale 5 is engraved, and the scale 5 is located near the indicator 6.

[0019] The other end of the movable seat 1 is provided with two parallel mounting arms 11, and the ends of the mounting arms 11 are provided with mounting holes. The two ends of the fixed shaft 3 are fixedly installed in the mounting holes of the two mounting arms 11.

[0020] The fixed shaft 3 is provided with spacers 12 on both sides of the worm gear 14 for limiting the worm gear 14. Spacers 12 of different lengths can be used to adjust the position of the worm gear 14 on the fixed shaft 3, thereby adjusting the height of the worm gear 14.

[0021] When the machined worm gear 14 and worm 13 mesh, if the contact area does not meet the requirements, rotate the movable seat 1 in both directions until the contact area changes to meet the requirements. For the adjustment angle value, directly adjust the corresponding angle and direction of the hob head on the gear hobbing machine, and then machine the worm gear 14. This will produce a pair of worm gears 14 and worm 13 that meet the design contact area. The adjustment angle will not be very large, generally within ±10°.

[0022] The worm gear 13 is mounted on the lathe spindle, ensuring it can rotate freely. The worm wheel 14 is mounted on a simple auxiliary fixture, also allowing free rotation. This fixture is mounted on a follower post. After adjusting the X and Y axial positions of the follower post and determining the mounting distance between the worm wheel 14 and the worm gear 13, parameters such as the worm wheel 14 angle adjustment, meshing and jamming detection, and contact area detection are performed. The hob post angle of the gear hobbing machine is then adjusted based on the angle adjustment. The simple auxiliary fixture allows for fine-tuning of both angle and height to ensure the correct mounting positions of the worm wheel 14 and the worm gear 13, as well as the visibility of the fine-tuning angle. This invention has a simple structure, good manufacturability, and convenient operation, possessing certain practical value.

Claims

1. A simple auxiliary tool for testing worm gears on a conventional lathe, characterized in that: It includes a movable seat, a fixed seat, and a fixed shaft. The fixed seat is fixedly installed on the tool holder of a conventional lathe. One end of the movable seat is movably installed on the fixed seat and can be fixed by a tension bolt. The other end of the movable seat is fixedly provided with a fixed shaft, and the worm gear is sleeved on the fixed shaft through a bearing. The movable seat is engraved with a scale to show the rotation angle, and the fixed seat is provided with an indicator at the corresponding scale position.

2. The simple auxiliary tool for testing worm gears on a conventional lathe according to claim 1, characterized in that: The fixed base includes a cylindrical body, which is fixedly installed on the tool holder of a conventional lathe. An annular plate extends outward from the outer circle of one end of the cylindrical body, and the indicator is set on the outer circle of the annular plate.

3. The simple auxiliary tool for testing worm gears on a conventional lathe according to claim 2, characterized in that: The movable seat has a mounting post at one end, which is inserted into the cylinder. The end of the mounting post has a threaded hole. The tension bolt is inserted from the other end of the cylinder and threadedly connected to the mounting post. The middle part of the movable seat is a conical surface with ±20° scales engraved on the conical surface, and the scales are located near the indicator.

4. The simple auxiliary tool for testing worm gears on a conventional lathe according to claim 3, characterized in that: The other end of the movable seat is provided with two parallel mounting arms, and the ends of the mounting arms are provided with mounting holes. The two ends of the fixed shaft are fixedly installed in the mounting holes of the two mounting arms.

5. The simple auxiliary tool for testing worm gears on a conventional lathe according to claim 1, characterized in that: The fixed shaft is provided with spacers on both sides of the worm gear to limit the movement of the worm gear.

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